32
NOTICE
Install boiler per Direct Venting requirements.
Install MCHP per Non-Direct Venting Requirements.
Distinction is noted to ensure proper location of vent
terminations.
Clearance from bottom of termination to grade shall •
be 12” or increased to maintain 12” above anticipated
accumulated snow level.
Vent shall not terminate over public walkways or over •
area where condensate or vapor could create nuisance
or hazard.
Vent termination shall be installed at least 1 foot from •
any opening through which fl ue gases could enter
building.
Vent termination shall have minimum horizontal •
clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
Locate vent terminal 3 feet horizontally from vent •
of any side wall vented fuel gas appliance or clothes
dryer, except in case of hydronic
freewatt PLUS
System where boiler and MCHP vents may be located
with respect to each other per Figures 10-1 or 10-2.
10.6 United States Non-Direct Vent System
Requirements
Non-direct vent exhaust for MCHP shall be installed in
United States accordance with following requirements; non-
direct vent exhaust piping lengths for MCHP are found in
Honda MCHP Installation Manual:
Clearance from bottom of termination to grade shall •
be 12” or increased to maintain 12” above anticipated
accumulated snow level.
Vent shall not terminate over public walkways or over •
area where condensate or vapor could create nuisance
or hazard.
Vent termination shall be installed at least 4 feet below, •
4 feet horizontally from, or 1 foot above any door,
window, soffi t, under eave vent or gravity air inlet to
the building.
Vent termination shall have minimum horizontal •
clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
Locate vent terminal 3 feet horizontally from vent •
of any side wall vented fuel gas appliance or clothes
dryer, except in case of hydronic
freewatt Plus
system
where boiler and MCHP vents may be located
with respect to each other per fi gures 10-1 or 10-2.
10 - COMBUSTION AIR AND VENT PIPE
Figure 10-2
Figure 10-1
Boiler Vent
3” Min.
7”
8”
Boiler Air
Intake
MCHP Vent
12”
Min. Separation
3” Max Separation
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